Sapphire Dual-X R9 280x, is this as good as they will get?

edited March 2014 in Hardware

I'll try and give as much specs as I can to help if I can push these cards any more.

Windows 7 Ultimate 64bit
Asus p5b-f deluxe mb
3gigs of ram
Corsair CS750M 80plus gold 750 watt psu
2 Sapphire Dual-X R9 280x model 11221-00-20G

~705 KH/s is about the max I can get with both cards, I have tried many configs posted from different sites and this is my config

cgminer.exe --scrypt -o -u xxxx -p xxxx -g 2 -I 13,13 -w 256,256 --thread-concurrency 8192,8192

I've tried lowering the threads but nothing gets accepted and anything higher than 8192 cgminer crashes before it gets to do anything

This is about 5 mins into mining....



  • Windows 7 Home Premium 
    Z87 Pro V Edition
    8g RAM
    Raider silver rated 750psu
    2 Sapphire Dual X R9 280x 

    I get around 728kh per card with the below scrypt. Best of luck. 

    color 09
    cgminer --scrypt -o -u xxx -p xxx --shaders 2048 --intensity 13 --worksize 256 -g 2 --thread-concurrency 11200 -g 2 -w 256 -I 13 --gpu-engine 1050 --gpu-memclock 1500 --gpu-powertune -20 --expiry 1 --scan-time 1 --queue 0 --no-submit-stale 
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